Wednesday, June 11, 2014

NASA's "Enterprise" for faster-than-light Space Travel

ISX Enterprise

NASA scientist and Advanced Propulsion Team Lead Harold White has the kind of job thousands dream of and few achieve — he’s in charge of the space agency’s efforts to determine if a faster-than-light warp drive is actually possible and, if it is, how we might create one. Now, in conjunction with artist Mark Rademaker, White has unveiled a new starship model that illustrates how our consideration of the concept has evolved over the decades. Rademaker designed the first theoretical warp ship concept to consciously echo the Matt Jeffries design for the UEV-47; the first faster-than-light version of the Starship Enterprise. This new version of the ship is chunkier, more compact, and according to Harold White, a better match for what the mathematics of an Alcubierre warp drive currently predict.
And of course, she’s called the IXS Enterprise.

IXS Enterprise

Have we found any proof a warp drive can exist?

While a pretty concept design is nice, it still isn’t clear if a warp drive can actually exist. NASA’s current experiments are an attempt to measure whether the warp bubble Alcubierre theorized could exist can exist in our universe. There’s an enormous gap between saying “Mathematically this doesn’t violate any of the known laws of physics,” and saying “We’ve detected an actual warp bubble in the real world.”
The inferometer experiment White oversees is designed to measure such an effect at nanoscale. Currently, data is inconclusive — the team notes that while a non-zero effect was observed, it’s possible that the difference was caused by external sources. More data, in other words, is necessary. Failure of the experiment wouldn’t automatically mean that warp bubbles can’t exist — it’s possible that we’re attempting to detect them in an ineffective way.
White-Juday_Warp_Field_interferometer
Nonetheless, the fact that we’re struggling to even discover if a warp bubble can form is evidence of how much work remains until we could plausibly tap the effect for space exploration. This new ship is as much a PR move as a demonstration of capability — but the implications of a warp bubble that allowed for even fractional light-speed travel are enormous. The ability to move at 1% the speed of light would put the entire Solar System within our reach; 0.1% light speed would make exploration and colonization of Mars or the Moon a much simpler problem.
Harold White's possible warp drive, and star ship
In Harold White’s possible Alcubierre warp drive, the ring around the starship creates a “warp bubble” that allows for faster-than-light travel inside it.
One good piece of news is that early fears that a hypothetical warp drive could be a star system-annihilating event have been disproven by a better evaluation of the mathematics. New data suggests this is unlikely to be an issue, though vessels observing the warp drive ship in close proximity could still be at risk. Energy requirements have also come down sharply, from Alcubierre’s initial calculation that planetary-sized power sources would be required to more recent data that suggests we could build a ship with a power source the size of Voyager 2 — if we can create the necessary effect at the appropriate scale
For now, a warp drive remains science fiction — but if we can ever build one, the impact on human civilization could rival the invention of fire. Despite some bombastic reporting in other places, it’s not a “real-life” Enterprise — not yet — but the fact that news of warp drive research continues to grab headlines is an example of just how exciting this technology could be.

Tuesday, June 10, 2014

Turn your Computer to Quantum Computer !

Google Chrome, Quantum Computing Playground IDE

Thanks to some ingenious engineers at Google, you can now turn your desktop PC into a quantum computer. Well, OK, not quite: You can simulate a quantum computer on your PC by running the Quantum Computing Playground web app for Chrome. The Playground allows you to run famous quantum algorithms, such as Grover’s, or even to write your own quantum script. 
The Quantum Computing Playground is a Chrome Experiment (i.e. web app) that uses WebGL to simulate up to 22 qubits on your GPU. You get a basic IDE to write, compile, and run your code; some example algorithms (Grover’s, Shor’s); and a handy debugger and 3D quantum state visualization tool, so you can see what’s going on inside your little quantum computer. The programs are written in a language called QScript, which looks a lot like any other simple Bash-like scripting language.
Here's the link 
http://qcplayground.withgoogle.com/#/home

Quantum Compass : Successor to GPS

Cooling Lasers

Virtually every mobile device on the planet has a GPS chip built-in that lets you find your way around, but GPS is getting old and doesn’t work well in all situations. The British Ministry of Defence is hard at work developing a so-called “quantum compass” that could become the successor to GPS, and just like GPS, it might land in your pocket one day.

The UK military is investing millions of pounds in the quantum compass mainly for use in submarines. GPS systems require a view of the sky, or at least very little obstruction to get a location fix. A tube of metal sliding through the water 100 meters beneath the waves can’t really get a GPS lock. Subs currently use a type of inertial location system based on accelerometers. Each twist and turn a submarine makes is recorded and used to calculate its position based on the last known coordinates. This is called dead reckoning navigation.

Submarine
A quantum compass takes advantage of the 1997 Nobel-winning discovery that lasers can be used to cool atoms to within fractions of a degree of absolute zero. Atoms in this frozen state are extremely sensitive to the magnetic and gravitational field of the Earth. Thus, they can be used to track movement with amazing accuracy. To be clear, this is still a type of inertial “dead reckoning” navigation. The difference is that after getting a solid GPS lock, a sub could go underwater and be exactly on target when it surfaces days or even weeks later.

The prototype compass build by the Ministry of Defence resembles a 1-meter-long shoe box. Inside is an array of lasers cooling a tiny cloud of rubidium atoms. Three such devices could be placed at right angles to each other to measure movement along all three axes. The next step is to miniaturize the technology, perhaps making it compact enough to be integrated in a single chip.
But why go to all this trouble for submarines? Well, that’s not the only reason for governments to move away from satellite positioning systems. The US has long warned that the signals from GPS satellites could be interfered with or hijacked to corrupt location information. Additionally, as international tensions mount over space, several countries (most notably China) have tested satellite-busting weapons that could cripple GPS and leave space strewn with junk. And of course, the US could always cut off other countries and civilians from using its GPS network.

Dropletons : New State of Matter


There was a time when states of matter were simple: Solid, liquid, gas. Then came plasma, Bose -Einstein condensate, supercritical fluid and more. Now the list has grown by one more, with the unexpected discovery of a new state dubbed “dropletons” that bear some resemblance to liquids but occur under very different circumstances.
The discovery occurred when a team at the University of Colorado Joint Institute for Lab Astrophysics were focusing laser light on gallium arsenide (GaAs) to create excitons.
Excitons are formed when a photon strikes a material, particularly a semiconductor. If an electron is knocked loose, or excited, it leaves what is termed an “electron hole” behind. If the forces of other charges nearby keep the electron close enough to the hole to feel an attraction, a bound state forms known as an exciton. Excitons are called quasiparticles because the electrons and holes behave together as if they were a single particle.
If this all sounds a bit hard to relate to, consider that solar cells are semiconductors, and the formation of excitons is one possible step to the production of electricity. A better understanding of how excitons form and behave could produce ways to harvest sunlight more efficiently.
Graduate student Andrew Almand-Hunter was forming biexcitons – two excitons that behave like a molecule, by focusing the laser to a dot 100nm across and leaving it on for shorter and shorter fractions of a second.
“But the experiment didn’t behave at all in the way we expected,” Almand-Hunter said. When the pulses were lasting less than 100 millionths of a second exciton density reached a critical threshold. “We expected to see the energy of the biexcitons increase as the laser generated more electrons and holes. But, what we saw when we did the experiment was that the energy actually decreased!” 
The team figured that they had created something other than biexcitons, but were not sure what. They contacted theorists at Philipps-University, Marburg who suggested they had made droplets of 4, 5 or 6 electrons and holes, and constructed a model of these dropletons' behavior. 
The dropletons are small enough to behave quantum mechanically, but the electrons and holes are not in pairs, as they would be if the dropleton was just a group of excitons. Instead they form a “quantum fog” of electrons and holes that flow around each other and even ripple like a liquid, rather than existing as discrete pairs. However, unlike liquids we are familiar with, dropletons a finite size, outside which the electron/hole association breaks down.
The discovery has been published in Nature. Perhaps the most remarkable thing is that the dropletons are stable, by the standards of quantum physics. While they can only survive inside solid materials, they last around 25 trillionths of a second, which is actually long enough for scientists to study the way their behavior is shaped by the environment. At 200nm wide the dropletons are as large as very small bacteria – a size that can be seen by conventional microscopes.

Sunday, June 8, 2014

Interesting Maps !

If you’re a visual learner like myself, then you know maps, charts and infographics can really help bring data and information to life. Maps can make a point resonate with readers and this collection aims to do just that.
Hopefully some of these maps will surprise you and you’ll learn something new. A few are important to know, some interpret and display data in a beautiful or creative way, and a few may even make you chuckle or shake your head.
If you enjoy this collection of maps, the I highly recommend the r/MapPorn sub reddit. You should also check outChartsBin.com. There were also fantastic posts on Business Insider and Bored Panda earlier this year that are worth checking out. Enjoy!

1. WHERE GOOGLE STREET VIEW IS AVAILABLE

map-of-the-world-where-google-street-view-is-available

2. COUNTRIES THAT DO NOT USE THE METRIC SYSTEM

map-of-countires-that-use-metric-system-vs-imperial

3. THE ONLY 22 COUNTRIES IN THE WORLD BRITAIN HAS NOT INVADED (NOT SHOWN: SAO TOME AND PRINCIPE)

the-only-countries-britain-has-not-invaded

4. MAP OF ‘PANGEA’ WITH CURRENT INTERNATIONAL BORDERS

map-of-pangea-with-current-internatoinal-borders
Map by eatrio.net via Reddit
Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras, forming about 300 million years ago. It began to break apart around 200 million years ago. The single global ocean which surrounded Pangaea is accordingly named Panthalassa.

5. MCDONALD’S ACROSS THE WORLD

map-of-countries-with-mcdonalds

6. PAID MATERNAL LEAVE AROUND THE WORLD

paid-maternal-leave-by-country

7. THE MOST COMMON SURNAMES IN EUROPE BY COUNTRY

map-of-most-common-surnames-in-europe

8. WORLDWIDE DRIVING ORIENTATION BY COUNTRY

Worldwide_Driving_Orientation_by_Country-(1)
Map by ChartsBin.com

9. MAP OF TIME ZONES IN ANTARCTICA

Map-of-time-zones-in-Anarctica

10. GLOBAL INTERNET USAGE BASED ON TIME OF DAY

internet-usage-of-the-world-based-on-time-of-day_2
Map by Carna Botnet via Reddit

11. THE WORLD’S BUSIEST AIR ROUTES IN 2012

top-10-busiest-air-travel-routes-of-2012

12. VISUALIZING GLOBAL POPULATION DENSITY

there-are-more-people-living-inside-this-circle-than-outside-of-it

13. FLAG MAP OF THE WORLD

Flag-Map-denmark-puerto

14. MAP OF ALCOHOL CONSUMPTION AROUND THE WORLD

map-of-alocohol-consumption-around-the-world

15. MAP OF ALCOHOLIC DRINK POPULARITY BY COUNTRY

drink-popularity-by-country

16. MAP OF RIVERS IN THE CONTIGUOUS UNITED STATES

map-of-united-states-rivers
Map by Nelson Minar

17. US MAP OF THE HIGHEST PAID PUBLIC EMPLOYEES BY STATE

highest-paid-US-public-employees-by-state
Map by Deadspin.com

18. WORLD MAP OF EARTHQUAKES SINCE 1898

earthquakes-by-magnitude-since-1898
Map by John M Nelson

19. MAP OF WHERE 29,000 RUBBER DUCKIES MADE LANDFALL AFTER FALLING OFF A CARGO SHIP IN THE MIDDLE OF THE PACIFIC OCEAN

where-rubber-ducks-made-landfall-after-being-dumped-in-pacific-ocean

20. MAP OF COUNTRIES WITH THE MOST VIOLATIONS OF BRIBERY

bribery-nigeria-is-the-worst

21. WORLD MAP OF VEGETATION ON EARTH

map-of-vegetation-on-earth
Map by NASA/NOAA

22. AVERAGE AGE OF FIRST SEXUAL INTERCOURSE BY COUNTRY

Average_Age_at_first_sex_by_Country-(1)
Map by ChartsBin.com

23. IF THE WORLD’S POPULATION LIVED IN ONE CITY

the-worlds-population-concentrated

24. THE NUMBER OF RESEARCHERS PER MILLION INHABITANTS
AROUND THE WORLD

Number_of_Researchers_per_million_inhabitants_by_Country
Map by ChartsBin.com

25. WORLDWIDE MAP OF OIL IMPORT AND EXPORT FLOWS

worldwide-oil-import-and-export-flows

26. THE 7000 RIVERS THAT FEED INTO THE MISSISSIPPI RIVER

map-of-rivers-that-feed-into-the-mississippi-river

27. WORLD MAP OF THE DIFFERENT WRITING SYSTEMS

map-of-the-writing-systems-of-the-world

28. WORLDWIDE ANNUAL COFFEE CONSUMPTION PER CAPITA

Coffee_Consumption-(3)
Map by ChartsBin.com

29. THE ECONOMIC CENTER OF GRAVITY SINCE 1 AD

evolution-of-the-earth's-economic-center-of-gravity

30. THE WORLD DIVIDED INTO 7 REGIONS,
EACH WITH A POPULATION OF 1 BILLION

population-of-the-world-split-into-equal-sections-of-one-billion

31. EARTH’S POPULATION BY LATITUDE AND LONGITUDE

the-worlds-population-by-latitue-and-longitude
Photograph by mrgeng on Reddit

32. MAP OF CONTIGUOUS UNITED STATES
OVERLAID ON THE MOON

map-of-united-states-overlaid-on-the-moon

33. FREQUENCY OF LIGHTNING STRIKES THROUGHOUT THE WORLD

frequency-of-lightning-strikes-in-the-world

34. OVERALL WATER RISK AROUND THE WORLD

drought-risk-its-not-just-isolated-around-the-equator

35. THE MOST DANGEROUS AREAS IN THE WORLD
TO SHIP DUE TO PIRATES

riskiest-areas-to-ship-where-the-pirates-rule-the-seas
Map by Control Risks

36. AREA CODES IN WHICH LUDACRIS CLAIMS TO HAVE H*ES
(SONG REFERENCE)

area-codes-in-which-ludracris-claims-to-have-hoes

37. WHERE 2% OF AUSTRALIA’S POPULATION LIVES

where-2-percent-of-australia-lives

38. THE LONGEST STRAIGHT LINE YOU CAN SAIL ON EARTH
(PAKISTAN TO KAMCHATKA PENINSULA, RUSSIA – 20000 MILES)

the-longest-straight-line-you-can-sail-in-the-world

39. MAP OF EUROPE SHOWING LITERAL
CHINESE TRANSLATIONS FOR COUNTRY NAMES

literal-map-of-europe-by-chinese-name

40. REVERSED MAP WITH SOUTHERN HEMISPHERE AT TOP OF MAP (BECAUSE POSITION OF NORTH IS ARBITRARY)

map-of-world-upside-down-south-pole-on-top
Map via nnm.me